Etymology

Usage

In science:

The inner parts of elliptical galaxies and many spiral bulges are well described by power-law (“cuspy ”) stellar density pro ﬁles of the form r ∼ r−g with g ≈ 2 .

The Final Parsec Problem

An example would be the possibility of avoiding the cuspy dark matter halo proﬁles expected in the context of CDM models.

The Role of Baryons in Unified Dark Matter Models

Many of the diﬃculties that CDM faces on small scales derive from the result that the centres of pure CDM halos are very cuspy.

Dark Matter in Galaxies: Conference Summary

Dwarf spheroidal galaxies show the highest degree of DM domination (Wilkinson), and the conclusion of Kleyna et al. (2003) that the UMi dwarf has a nearly harmonic core is certainly a headache for CDM, but Draco does have a cuspy potential (Kleyna et al. 2002).

Dark Matter in Galaxies: Conference Summary

It seems that in many, perhaps all LSB galaxies, the potentials are less cuspy than pure-CDM theory predicts.

Dark Matter in Galaxies: Conference Summary

If very high densities of dark matter are present in the galactic center, such as would be expected for very cuspy halo proﬁles or density spikes, sizable neutrino ﬂuxes could be produced.

Ferrer argued that χ annihilation into photons in the GC is an unpromising venture since the DM distribution is not cuspy. A better place to look would be Sagittarius or Draco which have a high M /L. W.

Summary of the XXXIX Rencontres de Moriond

The DM halo is then found to be ellipsoidal, less cuspy than the NFW (Navarro-Frenk-White) model and the Moore model.

Summary of the XXXIX Rencontres de Moriond

They also found that a central cuspy NFW ﬁtting proﬁle implies a velocity dispersion which is too large by a factor of ∼ 2 to be consistent with the measured velocity dispersion.

With no additional information it is impossible to infer uniquely the presence of convergence greater than unity: in contrast, when constructing the mass distribution from naturally cuspy components the convergence can be effectively interpolated upwards in a seamless and physically-reasonable way.